[Bug 12626] Interlaced modes broken in latest git

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=12626





--- Comment #46 from Andy Burns <freedesktopbugz at adslpipe.co.uk>  2008-03-23 10:24:54 PST ---
I realised I hadn't done any non-interlaced tests, in the case of my TV it
doesn't support non-interlaced modes, but I have the CRT monitor available, so
I tried 640x480 mode with it, this works fine (with and without my patch, and
as expected fails to produce a valid display if I make my patch *NOT*
unconditional instead of checking for V_INTERLACE)

It seems to me from looking at the register dumps by Michael Haas and from
debug prints I put into the driver that *something* has halved the values of
vertical registers for interlaced modes, presumably this is happening when the
mode values are calculated (or adjusted) rather than (at the stage I inserted
my hack) when they are poked into CRTC registers.

I tried a git bisect, but rapidly ran back to versions of the driver that the X
server refused to load (version compatibility with my server or drm module?)

Also I've looked "by eye" at the diffs between
0abce69f0d826a7ca1a41d963cd4730b6e01c145 
and
2618cf2aa8ed76411b943eb90c95869814c2f151
but the "merge and fix conflicts" in 
76670f665ebec7cdf40a04bf9379cb3ad4417507 
are a bit too much for me to follow manually, so much other development has
happened since that change, makes it difficult to follow code that has been
split into other files.

Perhaps this problem only affects certain cards, any clue how I can proceed
further?


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.